Calculating Pool Volume
Before you can determine the correct dosage of any chemical
you're going to add, it's important to know how much water
your pool holds. Make all your measurements in feet.
Example: use 12.5 instead of 12' 6".
1. Figure out
the average depth of your pool.
(deep end depth) feet + (shallow end depth) feet =
_______ feet / 2 = (average depth) feet
2. Calculate your pool's capacity using one of the formulas
below.
Pool Shape 
» Rectangular or square:
(length) feet x (width) feet x (average depth) feet x
7.5 = (pool capacity) gallons 
» Oval:
(maximum length) feet x (maximum depth) feet x
(average depth) feet x 5.9 = (pool capacity) gallons 
» Circular:
(diameter) feet x (diameter) feet x (average depth)
feet x 5.9 = (pool capacity) gallons 
